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package kiwi.core.services.triplestore;

import kiwi.core.api.triplestore.ResourceService;
import kiwi.core.api.triplestore.TripleStore;
import kiwi.core.model.rdf.KiWiNamespace;
import kiwi.core.model.rdf.KiWiNode;
import kiwi.core.model.rdf.KiWiResource;
import kiwi.core.model.rdf.KiWiTriple;

import javax.inject.Inject;
import javax.inject.Singleton;
import java.util.Locale;

/**
 * @author Sebastian Schaffert
 *
 */
@Singleton
public class TripleStoreUtil  {


    @Inject
    private TripleStore tripleStore;


    @Inject
    private ResourceService resourceService;


    public TripleStoreUtil() {
    }


	
	public static final String createCacheKey(KiWiTriple triple) {
		KiWiResource subject  = triple.getSubject();
		KiWiResource property = triple.getProperty();
		KiWiNode     object   = triple.getObject();
		KiWiResource context  = triple.getContext();
		
		return createCacheKey(subject,property,object,context);
 	}
	
	public static final String createCacheKey(KiWiResource subject, KiWiResource property, KiWiNode object, KiWiResource context) {
    	if(context != null) {
    		return "{"+subject.toString()+" "+property.toString()+" "+object.toString()+"}@"+context.toString();   
    	} else {
    		return "{"+subject.toString()+" "+property.toString()+" "+object.toString()+"}@GLOBAL";
    	}
	}

	
	public static final String createCacheKey(KiWiNamespace ns) {
		return ns.getPrefix();
	}

    public static final String createLiteralCacheKey(String contentMD5, Locale language, String type) {
        return contentMD5 +  ( language==null?"":("@" + language.toString()) ) + ( type==null?"":("^^" + type.toString()) );
    }
}
